mission in benghazi that killed a u.s. ambassador earlier this month. >> i think pretty clearly it was a terrorist attack. >> brown: at the pentagon today, defense secretary leon panetta seemed to have little doubt about what happened at the u.s. consulate in libya more than two weeks ago. >> a group of terrorists obviously conducted that attack on the consulate and against our individuals. what terrorists were involved, i think, remains to be determined by an investigation, but it clearly was a group of terrorists who conducted that attack against the facility. >> brown: what seemed clear today, though, had seemed less so just days ago. the original explanation for what happened the evening of september 11 was that an america-made movie denigrating islam had incited a mob, which had then stormed the u.s. consulate in benghazi. that attack left four americans dead, including u.s. ambassador to libya, christopher stephens. but in the weeks since, even as protests spread across the muslim world over the anti- muslim film, a